The mass distribution of the two bodies has spherical symmetry.

The mass of the central body is much larger than the orbiting body.

The distance between the two bodies is less than one astronomical unit.

None of the answers is correct.

provides the delta-v as a function of the specific impulse and the ratio of initial mass to final mass

provides the delta-v as a function of the thrust and the propulsion period.

None of the answers is correct.

provides the length of the rocket as a function of the mass of the rocket.

it facilitates the construction of very large vehicles.

it facilitates deployment in the launch base.

All answers are correct.

it allows higher burnout velocities for a given payload fraction.

It depends on the size of the propulsion system.

Between 10 s and 50 s.

Between 200 s and 400 s.

None of the answers is true.

approximately 8 km/s

It depends on the mass of the orbiting body

approximately 8 m/s

approximately 80 km/s

None of the answers is correct

Only the mechanical energy

The specific angular momentum and the specific mechanical energy